/*
 * File    : PRUDPPacketReplyConnect.java
 * Created : 20-Jan-2004
 * By      : parg
 * 
 * Azureus - a Java Bittorrent client
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details ( see the LICENSE file ).
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package com.aelitis.azureus.core.dht.transport.udp.impl;

/**
 * @author parg
 *
 */

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetSocketAddress;

import org.gudy.azureus2.core3.util.Debug;

import com.aelitis.azureus.core.dht.transport.DHTTransportContact;
import com.aelitis.azureus.core.dht.transport.DHTTransportException;
import com.aelitis.azureus.core.dht.transport.udp.impl.packethandler.DHTUDPPacketNetworkHandler;

public class DHTUDPPacketReplyError extends DHTUDPPacketReply {
    public static final int ET_UNKNOWN = 0;
    public static final int ET_ORIGINATOR_ADDRESS_WRONG = 1;
    public static final int ET_KEY_BLOCKED = 2;

    private int error_type = ET_UNKNOWN;

    private InetSocketAddress originator_address;
    private byte[] key_block_request;
    private byte[] key_block_signature;

    public DHTUDPPacketReplyError(DHTTransportUDPImpl transport, int trans_id, long conn_id, DHTTransportContact local_contact,
            DHTTransportContact remote_contact) {
        super(transport, DHTUDPPacketHelper.ACT_REPLY_ERROR, trans_id, conn_id, local_contact, remote_contact);
    }

    protected DHTUDPPacketReplyError(DHTUDPPacketNetworkHandler network_handler, InetSocketAddress originator, DataInputStream is, int trans_id)

    throws IOException {
        super(network_handler, originator, is, DHTUDPPacketHelper.ACT_REPLY_ERROR, trans_id);

        error_type = is.readInt();

        if (error_type == ET_ORIGINATOR_ADDRESS_WRONG) {

            originator_address = DHTUDPUtils.deserialiseAddress(is);

        } else if (error_type == ET_KEY_BLOCKED) {

            key_block_request = DHTUDPUtils.deserialiseByteArray(is, 255);
            key_block_signature = DHTUDPUtils.deserialiseByteArray(is, 65535);
        }
    }

    protected void setErrorType(int error) {
        error_type = error;
    }

    protected int getErrorType() {
        return (error_type);
    }

    protected void setOriginatingAddress(InetSocketAddress a) {
        originator_address = a;
    }

    protected InetSocketAddress getOriginatingAddress() {
        return (originator_address);
    }

    protected void setKeyBlockDetails(byte[] kbr, byte[] sig) {
        key_block_request = kbr;
        key_block_signature = sig;
    }

    protected byte[] getKeyBlockRequest() {
        return (key_block_request);
    }

    protected byte[] getKeyBlockSignature() {
        return (key_block_signature);
    }

    public void serialise(DataOutputStream os)

    throws IOException {
        super.serialise(os);

        os.writeInt(error_type);

        if (error_type == ET_ORIGINATOR_ADDRESS_WRONG) {

            try {
                DHTUDPUtils.serialiseAddress(os, originator_address);

            } catch (DHTTransportException e) {

                Debug.printStackTrace(e);

                throw (new IOException(e.getMessage()));
            }
        } else if (error_type == ET_KEY_BLOCKED) {

            DHTUDPUtils.serialiseByteArray(os, key_block_request, 255);
            DHTUDPUtils.serialiseByteArray(os, key_block_signature, 65535);
        }
    }
}
